Guards at the Curragh had blanks in their weapons and the internees, allied and German, were allowed to visit local pubs and join fishing and golf trips.
A boarding team from the Churchill transited the Iranian vessel before carrying out an initial seaworthiness inspection and providing the crew with food and water.
The Navy also issued an emergency evacuation order Wednesday evening for all non-essential active-duty service members and their families, activated reservists and civilian Department of Defense and Navy employees for a wide swath of coastal North Carolina.